This document announces the AI4Health Winter School from January 4-8, 2021 which will be held online. It will organize an interdisciplinary AI research network and train students and professionals in leading-edge AI research with a focus on applications in health. Some research themes within health that will be covered include deep care, personalized medicine, high-throughput biomedical investigations, and computer-assisted medical intelligence. The event aims to connect academic expertise in AI with companies and provide opportunities for students.